obama. but each side seems convinced they're winning. the obama campaign points to the battleground states. all eight of the states where the candidates are campaigning the hardest, the president is either tied or winning. but the romney campaign points to michigan, pennsylvania, and minnesota -- three states thought to be solidly democratic, but where obama is now playing defense. the president, back on the campaign trail today. going to wisconsin, colorado and nevada. mitt romney will be campaigning in virginia. george, you can expect both of them to be campaigning virtually nonstop between now and tuesday. >> no question about it. they're going to be focusing on the white battleground states and the pink in north carolina, over the next several days. we want to give you a sense of each side's strategy. what the obama campaign is trying to do is build a firewall in these three big, midwestern states. iowa, wisconsin, and ohio. he gets to 271 electoral votes. and if mitt romney wins all of